aki-t

You can display share-buttons at all of single posts and single pages very easily.

JTPP Share Buttons

You can display share-buttons at all of single posts and single pages very easily.

straps

Dynamic widget to insert classic social buttons and counters on your sidebar. 
Title changes based on page type users are visiting (Home, pages and posts). 
Insert a comma separated list of social sites in the order you want and start sharing. 
Play with all of the configuration options to reach the best visual appeal. 
Never forget to share your posts anymore and start increase visitors for your web site. 
Internationalization support via widget admin added.
See also: <a href="http://www.strx.it/2010/11/simple-sharing-wordpress-widget/" rel="nofollow ugc">Official Blog Post</a>.

Strx Simple Sharing Sidebar Widget

Dynamic widget to insert classic social buttons and counters on your sidebar.

JTPP Share Buttons vs Strx Simple Sharing Sidebar Widget